Added global parameters in disney material editor

Only layers existed until now. Now there are a set of global
parameters, like for example: name, alpha mask, emission.

Signed-off-by: Marius Avram <marius.avram1309@gmail.com>
Added close and folding button to DisneyMaterialEntityEditor

They are just decorative for now.

Signed-off-by: Marius Avram <marius.avram1309@gmail.com>